Byasa plutonius


Byasa plutonius, the Chinese windmill, is a butterfly found in Asia that belongs to the windmills genus, comprising tailed black swallowtail butterflies with white spots and red submarginal crescents.
The two subspecies in the Indian subcontinent have the common names of Pemberton's windmill and Tytler's windmill.

Range

This butterfly lives in south-western China, Bhutan, Nepal and north-east India.
In India, it is found in the states of Sikkim, Assam, Manipur, Nagaland and Mizoram.

Status

A rare species of high elevations, two subspecies are protected in India:B. p. pembertoni, Pemberton's Chinese windmill B. p. tytleri, '''Tytler's Chinese windmill'''

Taxonomy

There are three subspecies.

Description

  • Wingspan: 100–120 mm.
  • Tail black in both sexes.
  • Male: Above, brownish black and unmarked except for a row of markings.
  • Female: Above, paler. The female has traces of red lunules on the margins from veins 3 to 6 on the upper hindwing.